diff --git a/src/registrar/forms/domain.py b/src/registrar/forms/domain.py
index faf21e12e..ee1362415 100644
--- a/src/registrar/forms/domain.py
+++ b/src/registrar/forms/domain.py
@@ -181,6 +181,7 @@ NameserverFormset = formset_factory(
 class ContactForm(forms.ModelForm):
     """Form for updating contacts."""
 
+    email = forms.EmailField(max_length=None)
     class Meta:
         model = Contact
         fields = ["first_name", "middle_name", "last_name", "title", "email", "phone"]
@@ -204,6 +205,10 @@ class ContactForm(forms.ModelForm):
         # which interferes with out input_with_errors template tag
         self.fields["phone"].widget.attrs.pop("maxlength", None)
 
+        # Define a custom validator for the email field with a custom error message
+        email_max_length_validator = MaxLengthValidator(320, message="Response must be less than 320 characters.")
+        self.fields["email"].validators.append(email_max_length_validator)
+
         for field_name in self.required:
             self.fields[field_name].required = True